Dust cover for firearm magazine well



FIG. 1 is a front perspective view of a dust cover for a firearm magazine well, showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a rear elevation view;

FIG. 5 is a front elevation view;

FIG. 6 is left side elevation view; and,

FIG. 7 is a right side elevation view. 

The ornamental design for a dust cover for firearm magazine well, as shown and described. 